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authorDamien Miller <djm@mindrot.org>2000-01-14 15:45:46 +1100
committerDamien Miller <djm@mindrot.org>2000-01-14 15:45:46 +1100
commit34132e54cbd221d17d373fc54f4e3f7b85727f7f (patch)
tree7c73917b1082ff91786f9e02d25b853bedd1d472 /fake-getaddrinfo.c
parent25e4256ad4f453d8a7c1866243ec1984f859b1de (diff)
- Merged OpenBSD IPv6 patch:
- [sshd.c sshd.8 sshconnect.c ssh.h ssh.c servconf.h servconf.c scp.1] [scp.c packet.h packet.c login.c log.c canohost.c channels.c] [hostfile.c sshd_config] ipv6 support: mostly gethostbyname->getaddrinfo/getnameinfo, new features: sshd allows multiple ListenAddress and Port options. note that libwrap is not IPv6-ready. (based on patches from fujiwara@rcac.tdi.co.jp) - [ssh.c canohost.c] more hints (hints.ai_socktype=SOCK_STREAM) for getaddrinfo, from itojun@ - [channels.c] listen on _all_ interfaces for X11-Fwd (hints.ai_flags = AI_PASSIVE) - [packet.h] allow auth-kerberos for IPv4 only - [scp.1 sshd.8 servconf.h scp.c] document -4, -6, and 'ssh -L 2022/::1/22' - [ssh.c] 'ssh @host' is illegal (null user name), from karsten@gedankenpolizei.de - [sshconnect.c] better error message - [sshd.c] allow auth-kerberos for IPv4 only - Big IPv6 merge: - Cleanup overrun in sockaddr copying on RHL 6.1 - Replacements for getaddrinfo, getnameinfo, etc based on versions from patch from KIKUCHI Takahiro <kick@kyoto.wide.ad.jp> - Replacement for missing structures on systems that lack IPv6 - record_login needed to know about AF_INET6 addresses - Borrowed more code from OpenBSD: rresvport_af and requisites
Diffstat (limited to 'fake-getaddrinfo.c')
-rw-r--r--fake-getaddrinfo.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/fake-getaddrinfo.c b/fake-getaddrinfo.c
new file mode 100644
index 00000000..b918798c
--- /dev/null
+++ b/fake-getaddrinfo.c
@@ -0,0 +1,119 @@
+/*
+ * fake library for ssh
+ *
+ * This file includes getaddrinfo(), freeaddrinfo() and gai_strerror().
+ * These funtions are defined in rfc2133.
+ *
+ * But these functions are not implemented correctly. The minimum subset
+ * is implemented for ssh use only. For exapmle, this routine assumes
+ * that ai_family is AF_INET. Don't use it for another purpose.
+ *
+ * In the case not using 'configure --enable-ipv6', this getaddrinfo.c
+ * will be used if you have broken getaddrinfo or no getaddrinfo.
+ */
+
+#include "includes.h"
+#include "ssh.h"
+
+#ifndef HAVE_GAI_STRERROR
+char *
+gai_strerror(ecode)
+int ecode;
+{
+ switch (ecode) {
+ case EAI_NODATA:
+ return "no address associated with hostname.";
+ case EAI_MEMORY:
+ return "memory allocation failure.";
+ default:
+ return "unknown error.";
+ }
+}
+#endif /* !HAVE_GAI_STRERROR */
+
+#ifndef HAVE_FREEADDRINFO
+void
+freeaddrinfo(ai)
+struct addrinfo *ai;
+{
+ struct addrinfo *next;
+
+ do {
+ next = ai->ai_next;
+ free(ai);
+ } while (ai = next);
+}
+#endif /* !HAVE_FREEADDRINFO */
+
+#ifndef HAVE_GETADDRINFO
+static struct addrinfo *
+malloc_ai(port, addr)
+int port;
+u_long addr;
+{
+ struct addrinfo *ai;
+
+ if (ai = (struct addrinfo *)malloc(sizeof(struct addrinfo) +
+ sizeof(struct sockaddr_in))) {
+ memset(ai, 0, sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
+ ai->ai_addr = (struct sockaddr *)(ai + 1);
+ /* XXX -- ssh doesn't use sa_len */
+ ai->ai_addrlen = sizeof(struct sockaddr_in);
+ ai->ai_addr->sa_family = ai->ai_family = AF_INET;
+ ((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
+ ((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
+ return ai;
+ } else {
+ return NULL;
+ }
+}
+
+int
+getaddrinfo(hostname, servname, hints, res)
+const char *hostname, *servname;
+const struct addrinfo *hints;
+struct addrinfo **res;
+{
+ struct addrinfo *cur, *prev = NULL;
+ struct hostent *hp;
+ int i, port;
+
+ if (servname)
+ port = htons(atoi(servname));
+ else
+ port = 0;
+ if (hints && hints->ai_flags & AI_PASSIVE)
+ if (*res = malloc_ai(port, htonl(0x00000000)))
+ return 0;
+ else
+ return EAI_MEMORY;
+ if (!hostname)
+ if (*res = malloc_ai(port, htonl(0x7f000001)))
+ return 0;
+ else
+ return EAI_MEMORY;
+ if (inet_addr(hostname) != -1)
+ if (*res = malloc_ai(port, inet_addr(hostname)))
+ return 0;
+ else
+ return EAI_MEMORY;
+ if ((hp = gethostbyname(hostname)) &&
+ hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
+ for (i = 0; hp->h_addr_list[i]; i++)
+ if (cur = malloc_ai(port,
+ ((struct in_addr *)hp->h_addr_list[i])->s_addr)) {
+ if (prev)
+ prev->ai_next = cur;
+ else
+ *res = cur;
+ prev = cur;
+ } else {
+ if (*res)
+ freeaddrinfo(*res);
+ return EAI_MEMORY;
+ }
+ return 0;
+ }
+ return EAI_NODATA;
+}
+#endif /* !HAVE_GETADDRINFO */